seal chop stamp,三个都是章,有什么不一样?

seal [sɪːl] n。印章,印信,图章; 封印纸; 封; 封条#海豹; 海豹皮 v。封,密封; 保证; 盖章,盖印于; 确认; 猎海豹 seal [si:l] n。印章,封条,海豹 v。盖印,封闭,猎海豹 Examples:This document carries the royal seal。这份文件上盖有王室印章。The seal on this bottle is broken。这个瓶上的密封纸破开了。The envelope was firmly sealed。这个信封封得很严实。chop [tʃɒp] n。肋骨肉,排骨; 切球,削球; 砍,剁,劈; 切击#商标; 品质 v。砍,斩,劈; 劈成; 砍成; 劈出; 砍,猛击; 切球; 突然改变方向; 突然改变主意 chop [tʃɔp] n。厚肉片,排骨 v。剁碎,砍,切 Examples:The hunter cut off the animal's head with one chop of an ax。猎人一斧砍下猎物的头。She chopped the block of wood in two with a single blow。她一斧头把木块劈成两半。He chopped in with a sarcastic remark。他突然插进一句讽刺的话。stamp [stæmp] n。邮票; 验讫的标签; 印花; 图章,戳子,印 v。贴邮票于; 盖章于; 贴印花于; 压印于; 跺脚; 拒绝,毁掉,扑灭; 踩; 捣碎 stamp [stæmp] n。印,邮票,打印器 v。捺印,顿足,贴上邮票 Examples:His face bears the stamp of suffering。他的脸上有饱经苦难的烙印。She stamped on the insect and killed it。她踩死了一只虫子。The stamp in your library book shows it must be returned tomorrow。你从图书馆借的书上的戳记表明,这本书必须明天归还。company's seal 公章单位公章（Official seal）common seal公章